nymaim | a3f91454a34f41d7ab4249e71cb8a8a1a1f6031b3514bf4f7c774b73ba407312

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02/10/2022, 19:20

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General

Target
file.exe
Size 220KB
Sample221002-x132lsfee3
SHA256 a3f91454a34f41d7ab4249e71cb8a8a1a1f6031b3514bf4f7c774b73ba407312
MD5 af34e8b8e7b65a36d22900e1ec0924d3
SHA1 9092a25ecfd3f7ad9db689c5ddf81607699bc202
SHA512 a61c538db8bbe42a51312766d55750c92677a474943f527bbb8f177c804cd13362ea657ede7f92dc2a8849070bba6bb9e6389d7941fab1d50e8c3e74a0a0e0be
SSDEEP 6144:zjDMOjKFCWRMz5owHL38KfBG7Jm09Bdey:vgD9MzueNfYvt
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
2952	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

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0015000000022e5c-137.dat	autoit_exe
behavioral2/files/0x0015000000022e5c-138.dat	autoit_exe

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

System Information Discovery
T1082

Program crash 12 IoCs

pid	pid_target	Process	procid_target
1436	2876	WerFault.exe	82
2348	2876	WerFault.exe	82
1776	2876	WerFault.exe	82
3592	2876	WerFault.exe	82
1192	2876	WerFault.exe	82
4476	2876	WerFault.exe	82
3456	2876	WerFault.exe	82
2052	2876	WerFault.exe	82
4228	2876	WerFault.exe	82
2956	2876	WerFault.exe	82
4180	2876	WerFault.exe	82
736	2876	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
4344	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2876	file.exe
2876	file.exe
2876	file.exe
2876	file.exe
2876	file.exe
2876	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2876	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2952	Cleaner.exe
Token: SeDebugPrivilege	4344	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 4368	2876	file.exe	103
PID 2876 wrote to memory of 4368	2876	file.exe	103
PID 2876 wrote to memory of 4368	2876	file.exe	103
PID 4368 wrote to memory of 2952	4368	cmd.exe	105
PID 4368 wrote to memory of 2952	4368	cmd.exe	105
PID 2876 wrote to memory of 1540	2876	file.exe	119
PID 2876 wrote to memory of 1540	2876	file.exe	119
PID 2876 wrote to memory of 1540	2876	file.exe	119
PID 1540 wrote to memory of 4344	1540	cmd.exe	123
PID 1540 wrote to memory of 4344	1540	cmd.exe	123
PID 1540 wrote to memory of 4344	1540	cmd.exe	123

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:2876
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 460
  2⤵
  - Program crash
  PID:1436
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 776
  2⤵
  - Program crash
  PID:2348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 792
  2⤵
  - Program crash
  PID:1776
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 792
  2⤵
  - Program crash
  PID:3592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 860
  2⤵
  - Program crash
  PID:1192
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 856
  2⤵
  - Program crash
  PID:4476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 1020
  2⤵
  - Program crash
  PID:3456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 1252
  2⤵
  - Program crash
  PID:2052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 1376
  2⤵
  - Program crash
  PID:4228
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\2F6ozk9v9xT0NY3LixmnLeyKf\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4368
- - C:\Users\Admin\AppData\Local\Temp\2F6ozk9v9xT0NY3LixmnLeyKf\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\2F6ozk9v9xT0NY3LixmnLeyKf\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 1368
  2⤵
  - Program crash
  PID:2956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 1724
  2⤵
  - Program crash
  PID:4180
- 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:1540
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4344
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2876 -s 524
  2⤵
  - Program crash
  PID:736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2876 -ip 2876
1⤵
PID:1296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2876 -ip 2876
1⤵
PID:3756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2876 -ip 2876
1⤵
PID:1416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2876 -ip 2876
1⤵
PID:3776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2876 -ip 2876
1⤵
PID:1196

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 2876 -ip 2876
1⤵
PID:1876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2876 -ip 2876
1⤵
PID:1392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2876 -ip 2876
1⤵
PID:1004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 2876 -ip 2876
1⤵
PID:3572

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2876 -ip 2876
1⤵
PID:4864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 2876 -ip 2876
1⤵
PID:3128

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 2876 -ip 2876
1⤵
PID:1144

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\2F6ozk9v9xT0NY3LixmnLeyKf\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\2F6ozk9v9xT0NY3LixmnLeyKf\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\2F6ozk9v9xT0NY3LixmnLeyKf\Cleaner.exe
Size 3.8MB
SHA256 c394b068aa87264419f60838a8812b750e67cf93f2494c62b9078c3708072568
MD5 04514bd4962f7d60679434e0ebe49184
SHA1 1493a5447eb8156a7d7aecff60ee8bfba2209526
SHA512 a71c7ed5dfdda22f095dc99b16e8342a42e3361be16e0241dbf8983dd0d5f6e90eb0299aac1815cf78ad3a9f15fa89b42b720b7f818ee5f502300f102ef4c93e
SSDEEP 49152:+/PD/DL/D9CuZrr2h60qPPB+lJJkF9IC966eB+lJJkF9IC966eB+lJJkF9IC966h:+3D///UUrP43m8C/3m8C/3m8C5
MD5 SHA1 SHA512 SSDEEP

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memory/2876-134-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/2876-132-0x00000000005ED000-0x0000000000613000-memory.dmp

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memory/2876-133-0x0000000000750000-0x000000000078F000-memory.dmp

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memory/2876-144-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2952-139-0x0000026FD7E80000-0x0000026FD7FD6000-memory.dmp

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memory/2952-141-0x0000026FF23B0000-0x0000026FF23F2000-memory.dmp

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memory/2952-142-0x00007FF970750000-0x00007FF971211000-memory.dmp

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memory/2952-143-0x00007FF970750000-0x00007FF971211000-memory.dmp

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