nymaim | 252f7acdf228a6ee25eae2229cfb3d10c9f5e4bfa3a7e7acaf98b3651218477a

Analysis

max time kernel
115s
max time network
119s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
27/09/2022, 19:16

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General

Target
file.exe
Size 414KB
Sample220927-xyssvsfdck
SHA256 252f7acdf228a6ee25eae2229cfb3d10c9f5e4bfa3a7e7acaf98b3651218477a
MD5 7f0698dd1d6b4cf4256dfe3c09687051
SHA1 55e61078329b17f9871b4d87c94edca5d1f1c791
SHA512 691a4479a3744f4095875f174d0ef430b796e2c5025c843ee752740369fb638c5aa0c7a2bce3f3c629b943d4222edf00aa713e0d5fa710253b29bf6ca645d5bb
SSDEEP 6144:OQ4jQLRDj+bD1/QNnHVSB41XzY39AY/EEEEW06nigabwVfs:OQ4ARDKD1/Qd1u41zY39/EEEEX6iB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1744	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
768	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1624	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
780	1744	WerFault.exe	30

Kills process with taskkill 1 IoCs

evasion

pid	Process
1728	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1200	file.exe
1200	file.exe
1200	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1744	Cleaner.exe
Token: SeDebugPrivilege	1728	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 1624	1200	file.exe	28
PID 1200 wrote to memory of 1624	1200	file.exe	28
PID 1200 wrote to memory of 1624	1200	file.exe	28
PID 1200 wrote to memory of 1624	1200	file.exe	28
PID 1624 wrote to memory of 1744	1624	cmd.exe	30
PID 1624 wrote to memory of 1744	1624	cmd.exe	30
PID 1624 wrote to memory of 1744	1624	cmd.exe	30
PID 1624 wrote to memory of 1744	1624	cmd.exe	30
PID 1744 wrote to memory of 780	1744	Cleaner.exe	33
PID 1744 wrote to memory of 780	1744	Cleaner.exe	33
PID 1744 wrote to memory of 780	1744	Cleaner.exe	33
PID 1200 wrote to memory of 768	1200	file.exe	34
PID 1200 wrote to memory of 768	1200	file.exe	34
PID 1200 wrote to memory of 768	1200	file.exe	34
PID 1200 wrote to memory of 768	1200	file.exe	34
PID 768 wrote to memory of 1728	768	cmd.exe	36
PID 768 wrote to memory of 1728	768	cmd.exe	36
PID 768 wrote to memory of 1728	768	cmd.exe	36
PID 768 wrote to memory of 1728	768	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\cS1LHKFW1tdjZiv8dZKz\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1624
- - C:\Users\Admin\AppData\Local\Temp\cS1LHKFW1tdjZiv8dZKz\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\cS1LHKFW1tdjZiv8dZKz\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1744
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1744 -s 1152
      4⤵
      Program crash
      PID:780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:768
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\cS1LHKFW1tdjZiv8dZKz\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\cS1LHKFW1tdjZiv8dZKz\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\cS1LHKFW1tdjZiv8dZKz\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\cS1LHKFW1tdjZiv8dZKz\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/1200-69-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/1200-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1200-76-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/1200-75-0x000000000052C000-0x0000000000552000-memory.dmp

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memory/1200-55-0x000000000052C000-0x0000000000552000-memory.dmp

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memory/1200-57-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/1200-54-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

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memory/1200-56-0x00000000002D0000-0x000000000030F000-memory.dmp

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memory/1200-68-0x000000000052C000-0x0000000000552000-memory.dmp

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memory/1744-66-0x0000000000350000-0x0000000000392000-memory.dmp

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memory/1744-64-0x000007FEFC001000-0x000007FEFC003000-memory.dmp

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memory/1744-63-0x0000000000130000-0x00000000002B2000-memory.dmp

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