nymaim | 36a459c48622cdcdbfa27704398f4de1ee66e2e0b9ec6159ed57e66353beba22

Analysis

max time kernel
99s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
27/09/2022, 02:16

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General

Target
file.exe
Size 215KB
Sample220927-cp52lscch3
SHA256 36a459c48622cdcdbfa27704398f4de1ee66e2e0b9ec6159ed57e66353beba22
MD5 1af35a79d9651611175e58a3218a6bbf
SHA1 d4af156402b2009b52ec650ddfc629340beb02dd
SHA512 75bfa496702592b2a64afd6cdbf14e04ca25cb87c4b3c4cb2acbccfe84ccbd8adc349d1278526418a93e9378b9367db614f3a75ef872b62fb8b4c5e1659cbd71
SSDEEP 3072:yO7NHTI5VS6THZFntgEdUiZqzBC1uX+rjyqJztHK+edpOuz9fe0SmBbn1wmXF75B:ynS6TPntgTiAw1uX+ruqZypF5ll1we
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
4008	Cleaner.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	file.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 11 IoCs

pid	pid_target	Process	procid_target
4928	2796	WerFault.exe	81
5060	2796	WerFault.exe	81
4256	2796	WerFault.exe	81
1452	2796	WerFault.exe	81
4276	2796	WerFault.exe	81
3388	2796	WerFault.exe	81
432	2796	WerFault.exe	81
3020	2796	WerFault.exe	81
2168	2796	WerFault.exe	81
1864	2796	WerFault.exe	81
4388	2796	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
4692	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2796	file.exe
2796	file.exe
2796	file.exe
2796	file.exe
2796	file.exe
2796	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2796	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4008	Cleaner.exe
Token: SeDebugPrivilege	4692	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 1324	2796	file.exe	102
PID 2796 wrote to memory of 1324	2796	file.exe	102
PID 2796 wrote to memory of 1324	2796	file.exe	102
PID 1324 wrote to memory of 4008	1324	cmd.exe	104
PID 1324 wrote to memory of 4008	1324	cmd.exe	104
PID 2796 wrote to memory of 3748	2796	file.exe	115
PID 2796 wrote to memory of 3748	2796	file.exe	115
PID 2796 wrote to memory of 3748	2796	file.exe	115
PID 3748 wrote to memory of 4692	3748	cmd.exe	119
PID 3748 wrote to memory of 4692	3748	cmd.exe	119
PID 3748 wrote to memory of 4692	3748	cmd.exe	119

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 452
  2⤵
  - Program crash
  PID:4928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 764
  2⤵
  - Program crash
  PID:5060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 772
  2⤵
  - Program crash
  PID:4256
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 772
  2⤵
  - Program crash
  PID:1452
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 856
  2⤵
  - Program crash
  PID:4276
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 928
  2⤵
  - Program crash
  PID:3388
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 928
  2⤵
  - Program crash
  PID:432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 1364
  2⤵
  - Program crash
  PID:3020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\Hb3bQdzrZOYlmqFrxd9d\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1324
- - C:\Users\Admin\AppData\Local\Temp\Hb3bQdzrZOYlmqFrxd9d\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\Hb3bQdzrZOYlmqFrxd9d\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4008
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 1232
  2⤵
  - Program crash
  PID:2168
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 1640
  2⤵
  - Program crash
  PID:1864
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:3748
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4692
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2796 -s 492
  2⤵
  - Program crash
  PID:4388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2796 -ip 2796
1⤵
PID:3364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2796 -ip 2796
1⤵
PID:3396

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 2796 -ip 2796
1⤵
PID:1028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 2796 -ip 2796
1⤵
PID:4076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 2796 -ip 2796
1⤵
PID:4236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2796 -ip 2796
1⤵
PID:2540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 2796 -ip 2796
1⤵
PID:2860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 2796 -ip 2796
1⤵
PID:2604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 632 -p 2796 -ip 2796
1⤵
PID:1340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 644 -p 2796 -ip 2796
1⤵
PID:4904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 628 -p 2796 -ip 2796
1⤵
PID:1944

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

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\Hb3bQdzrZOYlmqFrxd9d\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\Hb3bQdzrZOYlmqFrxd9d\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\Hb3bQdzrZOYlmqFrxd9d\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/2796-144-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/2796-143-0x0000000000869000-0x000000000088F000-memory.dmp

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memory/2796-134-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/2796-152-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/2796-133-0x00000000006E0000-0x000000000071F000-memory.dmp

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memory/2796-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2796-132-0x0000000000869000-0x000000000088F000-memory.dmp

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memory/4008-142-0x00007FFAA2490000-0x00007FFAA2F51000-memory.dmp

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memory/4008-145-0x00007FFAA2490000-0x00007FFAA2F51000-memory.dmp

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memory/4008-141-0x000001AB577E0000-0x000001AB57822000-memory.dmp

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memory/4008-139-0x000001AB559A0000-0x000001AB55B22000-memory.dmp

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