nymaim | 0f2dfae8d8b57cf0f90c4fca39d731c5da678e3defeb3d4812c0bddc83e3e66a

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27/09/2022, 01:12

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General

Target
file.exe
Size 216KB
Sample220927-bkhvvaddek
SHA256 0f2dfae8d8b57cf0f90c4fca39d731c5da678e3defeb3d4812c0bddc83e3e66a
MD5 5550ab3c735bf765b2e39e77e2e61a52
SHA1 97c71791d08fd63572bd3d29e29f5b296fc9d619
SHA512 6ec82e4fd9e6802126ed85e824debe6bb09fb51d8ef815779de9c6e59a8e2b8b4f7f10d1986e712c5233c279bb3d126d482b78d96bdf3c486b6555847087ff8c
SSDEEP 3072:EO1cTI5YuUfyazDlJA4yZVWaU5JeJXMFkqFi8f5W2Xxl6U4FBsAzyoBSu55B:E5uUfyadGDVceJXMiqFpf42xj4FGmS
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
1688	Cleaner.exe

Loads dropped DLL 1 IoCs

pid	Process
1360	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
2020	1688	WerFault.exe	32

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1916	file.exe
1916	file.exe
1916	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1916	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	Cleaner.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 1360	1916	file.exe	30
PID 1916 wrote to memory of 1360	1916	file.exe	30
PID 1916 wrote to memory of 1360	1916	file.exe	30
PID 1916 wrote to memory of 1360	1916	file.exe	30
PID 1360 wrote to memory of 1688	1360	cmd.exe	32
PID 1360 wrote to memory of 1688	1360	cmd.exe	32
PID 1360 wrote to memory of 1688	1360	cmd.exe	32
PID 1360 wrote to memory of 1688	1360	cmd.exe	32
PID 1688 wrote to memory of 2020	1688	Cleaner.exe	34
PID 1688 wrote to memory of 2020	1688	Cleaner.exe	34
PID 1688 wrote to memory of 2020	1688	Cleaner.exe	34

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\8WLEmxZ7K2fVbcC6oXweuQQ3\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1360
- - C:\Users\Admin\AppData\Local\Temp\8WLEmxZ7K2fVbcC6oXweuQQ3\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\8WLEmxZ7K2fVbcC6oXweuQQ3\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1688
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1688 -s 1076
      4⤵
      Program crash
      PID:2020

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\8WLEmxZ7K2fVbcC6oXweuQQ3\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\8WLEmxZ7K2fVbcC6oXweuQQ3\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\8WLEmxZ7K2fVbcC6oXweuQQ3\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\8WLEmxZ7K2fVbcC6oXweuQQ3\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/1688-66-0x000007FEFBCB1000-0x000007FEFBCB3000-memory.dmp

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memory/1688-65-0x0000000000A10000-0x0000000000B92000-memory.dmp

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memory/1688-68-0x0000000000590000-0x00000000005D2000-memory.dmp

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memory/1916-59-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/1916-58-0x000000000073B000-0x0000000000762000-memory.dmp

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memory/1916-57-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/1916-55-0x000000000073B000-0x0000000000762000-memory.dmp

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memory/1916-54-0x0000000075211000-0x0000000075213000-memory.dmp

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memory/1916-56-0x0000000000220000-0x000000000025F000-memory.dmp

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memory/1916-70-0x0000000010000000-0x000000001001B000-memory.dmp

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