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Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83)

Okrum is a Windows backdoor that has been seen in use since December 2016 with strong links to Ke3chang.(Citation: ESET Okrum July 2019)

Cluster A Galaxy A Cluster B Galaxy B Level
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Deobfuscate/Decode Files or Information - T1140 (3ccef7ae-cb5e-48f6-8302-897105fbf55c) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware System Time Discovery - T1124 (f3c544dc-673c-4ef3-accb-53229f1ae077) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Keylogging - T1056.001 (09a60ea3-a8d1-4ae5-976e-5783248b72a4) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Steganography - T1027.003 (c2e147a9-d1a8-4074-811a-d8789202d916) Attack Pattern 1
Masquerade Task or Service - T1036.004 (7bdca9d5-d500-4d7d-8c52-5fd47baf4c0c) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Cached Domain Credentials - T1003.005 (6add2ab5-2711-4e9d-87c8-7a0be8531530) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Archive via Custom Method - T1560.003 (143c0cbb-a297-4142-9624-87ffc778980b) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Exfiltration Over C2 Channel - T1041 (92d7da27-2d91-488e-a00c-059dc162766d) Attack Pattern 1
Token Impersonation/Theft - T1134.001 (86850eff-2729-40c3-b85e-c4af26da4a2d) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
System Owner/User Discovery - T1033 (03d7999c-1f4c-42cc-8373-e7690d318104) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
System Information Discovery - T1082 (354a7f88-63fb-41b5-a801-ce3b377b36f1) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware System Network Configuration Discovery - T1016 (707399d6-ab3e-4963-9315-d9d3818cd6a0) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Registry Run Keys / Startup Folder - T1547.001 (9efb1ea7-c37b-4595-9640-b7680cd84279) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Shortcut Modification - T1547.009 (4ab929c6-ee2d-4fb5-aab4-b14be2ed7179) Attack Pattern 1
LSASS Memory - T1003.001 (65f2d882-3f41-4d48-8a06-29af77ec9f90) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Protocol Impersonation - T1001.003 (c325b232-d5bc-4dde-a3ec-71f3db9e8adc) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware External Proxy - T1090.002 (69b8fd78-40e8-4600-ae4d-662c9d7afdb3) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Scheduled Task - T1053.005 (005a06c6-14bf-4118-afa0-ebcd8aebb0c9) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Hidden Files and Directories - T1564.001 (ec8fc7e2-b356-455c-8db5-2e37be158e7d) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware File Deletion - T1070.004 (d63a3fb8-9452-4e9d-a60a-54be68d5998c) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Service Execution - T1569.002 (f1951e8a-500e-4a26-8803-76d95c4554b4) Attack Pattern 1
Symmetric Cryptography - T1573.001 (24bfaeba-cb0d-4525-b3dc-507c77ecec41) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Archive via Utility - T1560.001 (00f90846-cbd1-4fc5-9233-df5c2bf2a662) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Windows Service - T1543.003 (2959d63f-73fd-46a1-abd2-109d7dcede32) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware File and Directory Discovery - T1083 (7bc57495-ea59-4380-be31-a64af124ef18) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Time Based Evasion - T1497.003 (4bed873f-0b7d-41d4-b93a-b6905d1f90b0) Attack Pattern 1
Web Protocols - T1071.001 (df8b2a25-8bdf-4856-953c-a04372b1c161) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware User Activity Based Checks - T1497.002 (91541e7e-b969-40c6-bbd8-1b5352ec2938) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware System Checks - T1497.001 (29be378d-262d-4e99-b00d-852d573628e6) Attack Pattern 1
System Network Connections Discovery - T1049 (7e150503-88e7-4861-866b-ff1ac82c4475) Attack Pattern Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Ingress Tool Transfer - T1105 (e6919abc-99f9-4c6c-95a5-14761e7b2add) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Standard Encoding - T1132.001 (04fd5427-79c7-44ea-ae13-11b24778ff1c) Attack Pattern 1
Okrum - S0439 (4b6ec280-7bbb-48ff-ae59-b189520ebe83) Malware Windows Command Shell - T1059.003 (d1fcf083-a721-4223-aedf-bf8960798d62) Attack Pattern 1
Input Capture - T1056 (bb5a00de-e086-4859-a231-fa793f6797e2) Attack Pattern Keylogging - T1056.001 (09a60ea3-a8d1-4ae5-976e-5783248b72a4) Attack Pattern 2
Obfuscated Files or Information - T1027 (b3d682b6-98f2-4fb0-aa3b-b4df007ca70a) Attack Pattern Steganography - T1027.003 (c2e147a9-d1a8-4074-811a-d8789202d916) Attack Pattern 2
Masquerade Task or Service - T1036.004 (7bdca9d5-d500-4d7d-8c52-5fd47baf4c0c) Attack Pattern Masquerading - T1036 (42e8de7b-37b2-4258-905a-6897815e58e0) Attack Pattern 2
Cached Domain Credentials - T1003.005 (6add2ab5-2711-4e9d-87c8-7a0be8531530) Attack Pattern OS Credential Dumping - T1003 (0a3ead4e-6d47-4ccb-854c-a6a4f9d96b22) Attack Pattern 2
Archive Collected Data - T1560 (53ac20cd-aca3-406e-9aa0-9fc7fdc60a5a) Attack Pattern Archive via Custom Method - T1560.003 (143c0cbb-a297-4142-9624-87ffc778980b) Attack Pattern 2
Token Impersonation/Theft - T1134.001 (86850eff-2729-40c3-b85e-c4af26da4a2d) Attack Pattern Access Token Manipulation - T1134 (dcaa092b-7de9-4a21-977f-7fcb77e89c48) Attack Pattern 2
Registry Run Keys / Startup Folder - T1547.001 (9efb1ea7-c37b-4595-9640-b7680cd84279) Attack Pattern Boot or Logon Autostart Execution - T1547 (1ecb2399-e8ba-4f6b-8ba7-5c27d49405cf) Attack Pattern 2
Boot or Logon Autostart Execution - T1547 (1ecb2399-e8ba-4f6b-8ba7-5c27d49405cf) Attack Pattern Shortcut Modification - T1547.009 (4ab929c6-ee2d-4fb5-aab4-b14be2ed7179) Attack Pattern 2
LSASS Memory - T1003.001 (65f2d882-3f41-4d48-8a06-29af77ec9f90) Attack Pattern OS Credential Dumping - T1003 (0a3ead4e-6d47-4ccb-854c-a6a4f9d96b22) Attack Pattern 2
Data Obfuscation - T1001 (ad255bfe-a9e6-4b52-a258-8d3462abe842) Attack Pattern Protocol Impersonation - T1001.003 (c325b232-d5bc-4dde-a3ec-71f3db9e8adc) Attack Pattern 2
Proxy - T1090 (731f4f55-b6d0-41d1-a7a9-072a66389aea) Attack Pattern External Proxy - T1090.002 (69b8fd78-40e8-4600-ae4d-662c9d7afdb3) Attack Pattern 2
Scheduled Task - T1053.005 (005a06c6-14bf-4118-afa0-ebcd8aebb0c9) Attack Pattern Scheduled Task/Job - T1053 (35dd844a-b219-4e2b-a6bb-efa9a75995a9) Attack Pattern 2
Hide Artifacts - T1564 (22905430-4901-4c2a-84f6-98243cb173f8) Attack Pattern Hidden Files and Directories - T1564.001 (ec8fc7e2-b356-455c-8db5-2e37be158e7d) Attack Pattern 2
Indicator Removal - T1070 (799ace7f-e227-4411-baa0-8868704f2a69) Attack Pattern File Deletion - T1070.004 (d63a3fb8-9452-4e9d-a60a-54be68d5998c) Attack Pattern 2
System Services - T1569 (d157f9d2-d09a-4efa-bb2a-64963f94e253) Attack Pattern Service Execution - T1569.002 (f1951e8a-500e-4a26-8803-76d95c4554b4) Attack Pattern 2
Symmetric Cryptography - T1573.001 (24bfaeba-cb0d-4525-b3dc-507c77ecec41) Attack Pattern Encrypted Channel - T1573 (b8902400-e6c5-4ba2-95aa-2d35b442b118) Attack Pattern 2
Archive Collected Data - T1560 (53ac20cd-aca3-406e-9aa0-9fc7fdc60a5a) Attack Pattern Archive via Utility - T1560.001 (00f90846-cbd1-4fc5-9233-df5c2bf2a662) Attack Pattern 2
Create or Modify System Process - T1543 (106c0cf6-bf73-4601-9aa8-0945c2715ec5) Attack Pattern Windows Service - T1543.003 (2959d63f-73fd-46a1-abd2-109d7dcede32) Attack Pattern 2
Virtualization/Sandbox Evasion - T1497 (82caa33e-d11a-433a-94ea-9b5a5fbef81d) Attack Pattern Time Based Evasion - T1497.003 (4bed873f-0b7d-41d4-b93a-b6905d1f90b0) Attack Pattern 2
Web Protocols - T1071.001 (df8b2a25-8bdf-4856-953c-a04372b1c161) Attack Pattern Application Layer Protocol - T1071 (355be19c-ffc9-46d5-8d50-d6a036c675b6) Attack Pattern 2
User Activity Based Checks - T1497.002 (91541e7e-b969-40c6-bbd8-1b5352ec2938) Attack Pattern Virtualization/Sandbox Evasion - T1497 (82caa33e-d11a-433a-94ea-9b5a5fbef81d) Attack Pattern 2
System Checks - T1497.001 (29be378d-262d-4e99-b00d-852d573628e6) Attack Pattern Virtualization/Sandbox Evasion - T1497 (82caa33e-d11a-433a-94ea-9b5a5fbef81d) Attack Pattern 2
Data Encoding - T1132 (cc7b8c4e-9be0-47ca-b0bb-83915ec3ee2f) Attack Pattern Standard Encoding - T1132.001 (04fd5427-79c7-44ea-ae13-11b24778ff1c) Attack Pattern 2
Command and Scripting Interpreter - T1059 (7385dfaf-6886-4229-9ecd-6fd678040830) Attack Pattern Windows Command Shell - T1059.003 (d1fcf083-a721-4223-aedf-bf8960798d62) Attack Pattern 2