Analysis
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max time kernel
150s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
02-04-2024 13:10
Behavioral task
behavioral1
Sample
ab.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
ab.exe
Resource
win10v2004-20240226-en
General
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Target
ab.exe
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Size
775KB
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MD5
0b486fe0503524cfe4726a4022fa6a68
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SHA1
297dea71d489768ce45d23b0f8a45424b469ab00
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SHA256
1228d0f04f0ba82569fc1c0609f9fd6c377a91b9ea44c1e7f9f84b2b90552da2
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SHA512
f4273ca5cc3a9360af67f4b4ee0bf067cf218c5dc8caeafbfa1b809715effe742f2e1f54e4fe9ec8d4b8e3ae697d57f91c2b49bdf203648508d75d4a76f53619
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SSDEEP
24576:TCs99+OXLpMePfI8TgmBTCDqEbOpPtpFhyxfq:5GOXLpMePfzVTCD7gPtLhSfq
Malware Config
Extracted
C:\Users\Admin\Desktop\CLkPQG0K_readme_.txt
avaddon
http://avaddongun7rngel.onion
http://avaddonbotrxmuyl.onion
Extracted
C:\Users\Admin\Documents\CLkPQG0K_readme_.txt
avaddon
http://avaddongun7rngel.onion
http://avaddonbotrxmuyl.onion
Extracted
C:\CLkPQG0K_readme_.txt
avaddon
http://avaddongun7rngel.onion
http://avaddonbotrxmuyl.onion
Signatures
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Avaddon
Ransomware-as-a-service first released in June 2020 and currently expanding its userbase among criminal actors.
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Avaddon payload 1 IoCs
resource yara_rule behavioral1/files/0x000a0000000122b8-613.dat family_avaddon -
Process spawned unexpected child process 3 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 848 2572 wmic.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2564 2572 wmic.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2764 2572 wmic.exe 28 -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" ab.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" ab.exe -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (203) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Executes dropped EXE 1 IoCs
pid Process 2452 ab.exe -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" ab.exe -
Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-1298544033-3225604241-2703760938-1000\desktop.ini ab.exe -
Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\G: ab.exe File opened (read-only) \??\L: ab.exe File opened (read-only) \??\O: ab.exe File opened (read-only) \??\U: ab.exe File opened (read-only) \??\F: ab.exe File opened (read-only) \??\A: ab.exe File opened (read-only) \??\J: ab.exe File opened (read-only) \??\K: ab.exe File opened (read-only) \??\R: ab.exe File opened (read-only) \??\S: ab.exe File opened (read-only) \??\W: ab.exe File opened (read-only) \??\Y: ab.exe File opened (read-only) \??\I: ab.exe File opened (read-only) \??\H: ab.exe File opened (read-only) \??\P: ab.exe File opened (read-only) \??\T: ab.exe File opened (read-only) \??\Z: ab.exe File opened (read-only) \??\B: ab.exe File opened (read-only) \??\M: ab.exe File opened (read-only) \??\N: ab.exe File opened (read-only) \??\Q: ab.exe File opened (read-only) \??\V: ab.exe File opened (read-only) \??\X: ab.exe File opened (read-only) \??\E: ab.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 2 TTPs 3 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2992 vssadmin.exe 1656 vssadmin.exe 1520 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe 328 ab.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 848 wmic.exe Token: SeSecurityPrivilege 848 wmic.exe Token: SeTakeOwnershipPrivilege 848 wmic.exe Token: SeLoadDriverPrivilege 848 wmic.exe Token: SeSystemProfilePrivilege 848 wmic.exe Token: SeSystemtimePrivilege 848 wmic.exe Token: SeProfSingleProcessPrivilege 848 wmic.exe Token: SeIncBasePriorityPrivilege 848 wmic.exe Token: SeCreatePagefilePrivilege 848 wmic.exe Token: SeBackupPrivilege 848 wmic.exe Token: SeRestorePrivilege 848 wmic.exe Token: SeShutdownPrivilege 848 wmic.exe Token: SeDebugPrivilege 848 wmic.exe Token: SeSystemEnvironmentPrivilege 848 wmic.exe Token: SeRemoteShutdownPrivilege 848 wmic.exe Token: SeUndockPrivilege 848 wmic.exe Token: SeManageVolumePrivilege 848 wmic.exe Token: 33 848 wmic.exe Token: 34 848 wmic.exe Token: 35 848 wmic.exe Token: SeIncreaseQuotaPrivilege 2564 wmic.exe Token: SeSecurityPrivilege 2564 wmic.exe Token: SeTakeOwnershipPrivilege 2564 wmic.exe Token: SeLoadDriverPrivilege 2564 wmic.exe Token: SeSystemProfilePrivilege 2564 wmic.exe Token: SeSystemtimePrivilege 2564 wmic.exe Token: SeProfSingleProcessPrivilege 2564 wmic.exe Token: SeIncBasePriorityPrivilege 2564 wmic.exe Token: SeCreatePagefilePrivilege 2564 wmic.exe Token: SeBackupPrivilege 2564 wmic.exe Token: SeRestorePrivilege 2564 wmic.exe Token: SeShutdownPrivilege 2564 wmic.exe Token: SeDebugPrivilege 2564 wmic.exe Token: SeSystemEnvironmentPrivilege 2564 wmic.exe Token: SeRemoteShutdownPrivilege 2564 wmic.exe Token: SeUndockPrivilege 2564 wmic.exe Token: SeManageVolumePrivilege 2564 wmic.exe Token: 33 2564 wmic.exe Token: 34 2564 wmic.exe Token: 35 2564 wmic.exe Token: SeIncreaseQuotaPrivilege 848 wmic.exe Token: SeSecurityPrivilege 848 wmic.exe Token: SeTakeOwnershipPrivilege 848 wmic.exe Token: SeLoadDriverPrivilege 848 wmic.exe Token: SeSystemProfilePrivilege 848 wmic.exe Token: SeSystemtimePrivilege 848 wmic.exe Token: SeProfSingleProcessPrivilege 848 wmic.exe Token: SeIncBasePriorityPrivilege 848 wmic.exe Token: SeCreatePagefilePrivilege 848 wmic.exe Token: SeBackupPrivilege 848 wmic.exe Token: SeRestorePrivilege 848 wmic.exe Token: SeShutdownPrivilege 848 wmic.exe Token: SeDebugPrivilege 848 wmic.exe Token: SeSystemEnvironmentPrivilege 848 wmic.exe Token: SeRemoteShutdownPrivilege 848 wmic.exe Token: SeUndockPrivilege 848 wmic.exe Token: SeManageVolumePrivilege 848 wmic.exe Token: 33 848 wmic.exe Token: 34 848 wmic.exe Token: 35 848 wmic.exe Token: SeIncreaseQuotaPrivilege 2764 wmic.exe Token: SeSecurityPrivilege 2764 wmic.exe Token: SeTakeOwnershipPrivilege 2764 wmic.exe Token: SeLoadDriverPrivilege 2764 wmic.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 328 wrote to memory of 3064 328 ab.exe 35 PID 328 wrote to memory of 3064 328 ab.exe 35 PID 328 wrote to memory of 3064 328 ab.exe 35 PID 328 wrote to memory of 3064 328 ab.exe 35 PID 328 wrote to memory of 2992 328 ab.exe 40 PID 328 wrote to memory of 2992 328 ab.exe 40 PID 328 wrote to memory of 2992 328 ab.exe 40 PID 328 wrote to memory of 2992 328 ab.exe 40 PID 328 wrote to memory of 1976 328 ab.exe 42 PID 328 wrote to memory of 1976 328 ab.exe 42 PID 328 wrote to memory of 1976 328 ab.exe 42 PID 328 wrote to memory of 1976 328 ab.exe 42 PID 328 wrote to memory of 1656 328 ab.exe 44 PID 328 wrote to memory of 1656 328 ab.exe 44 PID 328 wrote to memory of 1656 328 ab.exe 44 PID 328 wrote to memory of 1656 328 ab.exe 44 PID 328 wrote to memory of 2760 328 ab.exe 46 PID 328 wrote to memory of 2760 328 ab.exe 46 PID 328 wrote to memory of 2760 328 ab.exe 46 PID 328 wrote to memory of 2760 328 ab.exe 46 PID 328 wrote to memory of 1520 328 ab.exe 48 PID 328 wrote to memory of 1520 328 ab.exe 48 PID 328 wrote to memory of 1520 328 ab.exe 48 PID 328 wrote to memory of 1520 328 ab.exe 48 PID 2796 wrote to memory of 2452 2796 taskeng.exe 54 PID 2796 wrote to memory of 2452 2796 taskeng.exe 54 PID 2796 wrote to memory of 2452 2796 taskeng.exe 54 PID 2796 wrote to memory of 2452 2796 taskeng.exe 54 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" ab.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" ab.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" ab.exe -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\ab.exe"C:\Users\Admin\AppData\Local\Temp\ab.exe"1⤵
- UAC bypass
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
PID:328 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic SHADOWCOPY DELETE /nointeractive2⤵PID:3064
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C:\Windows\SysWOW64\vssadmin.exevssadmin Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:2992
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C:\Windows\SysWOW64\Wbem\wmic.exewmic SHADOWCOPY DELETE /nointeractive2⤵PID:1976
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C:\Windows\SysWOW64\vssadmin.exevssadmin Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1656
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C:\Windows\SysWOW64\Wbem\wmic.exewmic SHADOWCOPY DELETE /nointeractive2⤵PID:2760
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C:\Windows\SysWOW64\vssadmin.exevssadmin Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1520
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C:\Windows\system32\wbem\wmic.exewmic SHADOWCOPY DELETE /nointeractive1⤵
- Process spawned unexpected child process
- Suspicious use of AdjustPrivilegeToken
PID:848
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C:\Windows\system32\wbem\wmic.exewmic SHADOWCOPY DELETE /nointeractive1⤵
- Process spawned unexpected child process
- Suspicious use of AdjustPrivilegeToken
PID:2564
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C:\Windows\system32\wbem\wmic.exewmic SHADOWCOPY DELETE /nointeractive1⤵
- Process spawned unexpected child process
- Suspicious use of AdjustPrivilegeToken
PID:2764
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵PID:3012
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C:\Windows\system32\taskeng.exetaskeng.exe {DEA82F87-6E8B-479D-8C87-73F8BF510827} S-1-5-21-1298544033-3225604241-2703760938-1000:IZKCKOTP\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:2796 -
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\ab.exeC:\Users\Admin\AppData\Roaming\Microsoft\Windows\ab.exe2⤵
- Executes dropped EXE
PID:2452
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Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Indicator Removal
2File Deletion
2Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3KB
MD57c4334fb74a944ce00650dd0fa47a869
SHA17db59d8bc0866f898176cd3148b6c69b25290f51
SHA2564a8fe72690d869275f595d892e8272cf7770d698ca800493418d4053cb6e2d10
SHA51251e319f843315d6dfa094cbcf03c88f6c1dc475f54c7c86f2da65842fc4567c6f264bdeaecd7e40b22908de8ecd210370503e326137cafb34926cf0f76106ab0
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Filesize
775KB
MD50b486fe0503524cfe4726a4022fa6a68
SHA1297dea71d489768ce45d23b0f8a45424b469ab00
SHA2561228d0f04f0ba82569fc1c0609f9fd6c377a91b9ea44c1e7f9f84b2b90552da2
SHA512f4273ca5cc3a9360af67f4b4ee0bf067cf218c5dc8caeafbfa1b809715effe742f2e1f54e4fe9ec8d4b8e3ae697d57f91c2b49bdf203648508d75d4a76f53619
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Filesize
3KB
MD5cb55543d89b2374ba5f4c10eb5672289
SHA1197cbc4f988df74e23b2d40e6fdbb2d2b251cc62
SHA2567f7014c36f72617f456625f15f4734be246df010c402808b19585c8ed4cc87a7
SHA512df8cbf7cb4ac96a7dc303cc98c3eeab5642d48b371f8c5c4197c6919f52f77514e852769e7c3297eb389ae2e80cd8d3715b68191f621844345637699441cc1ae
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Filesize
3KB
MD5f24dbdaddfd38f795b8ae70a13404c1a
SHA16821101221badeb3df381b7c68e97e650cec6806
SHA25612df535c3612f2df1fc91b2f6cf9a8182965fbb2f53554525af4dbc2c288f019
SHA512f76d6452d783def10d4a46f68a09486355a02efb76ad1b960ac0b093bf2b5a6a1eb772a721f9ed5dac5e5843820d63e58c96a1dc3f243b2d52816cbc82044698