nymaim | 3e080aa5f27fe32f457a9e2d5a8d1718fb1420ded17063bd1a7af344a1c45a92

Analysis

max time kernel
101s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
05/10/2022, 05:04

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General

Target
file.exe
Size 359KB
Sample221005-fp9xcaddd3
SHA256 3e080aa5f27fe32f457a9e2d5a8d1718fb1420ded17063bd1a7af344a1c45a92
MD5 0c2797decd96886ba21d17e81ea9d67f
SHA1 794c51feb4dbfc947a8938c35e9cbc088ff5ff13
SHA512 3e5392f8f822cf51f909709ce6ae3b1a2c06b718b4ab29a0056d6343e28fa6b9b128c309282eba4def9da16c72486401cb10df58e1738a69ae21e5d1c69b94d9
SSDEEP 6144:sG08KMZ5Lm5nf/8C6RTUikx11WLc0GlCvsWVCqZfuzbgwu7ywVf:sGvKKK5nHEUDWLcDlCkWVCqBunn6
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
4500	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-1-5-21-2629973501-4017243118-3254762364-1000\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/0x000f00000001629f-137.dat	autoit_exe
behavioral2/files/0x000f00000001629f-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
2016	792	WerFault.exe	82
1676	792	WerFault.exe	82
820	792	WerFault.exe	82
316	792	WerFault.exe	82
4552	792	WerFault.exe	82
4324	792	WerFault.exe	82
900	792	WerFault.exe	82
4740	792	WerFault.exe	82
756	792	WerFault.exe	82
4588	792	WerFault.exe	82
2228	792	WerFault.exe	82
2976	792	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
4420	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
792	file.exe
792	file.exe
792	file.exe
792	file.exe
792	file.exe
792	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
792	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4500	Cleaner.exe
Token: SeDebugPrivilege	4420	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 792 wrote to memory of 4872	792	file.exe	108
PID 792 wrote to memory of 4872	792	file.exe	108
PID 792 wrote to memory of 4872	792	file.exe	108
PID 4872 wrote to memory of 4500	4872	cmd.exe	110
PID 4872 wrote to memory of 4500	4872	cmd.exe	110
PID 792 wrote to memory of 4280	792	file.exe	119
PID 792 wrote to memory of 4280	792	file.exe	119
PID 792 wrote to memory of 4280	792	file.exe	119
PID 4280 wrote to memory of 4420	4280	cmd.exe	123
PID 4280 wrote to memory of 4420	4280	cmd.exe	123
PID 4280 wrote to memory of 4420	4280	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:792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 372
  2⤵
  - Program crash
  PID:2016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 764
  2⤵
  - Program crash
  PID:1676
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 804
  2⤵
  - Program crash
  PID:820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 804
  2⤵
  - Program crash
  PID:316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 780
  2⤵
  - Program crash
  PID:4552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 904
  2⤵
  - Program crash
  PID:4324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 908
  2⤵
  - Program crash
  PID:900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 1156
  2⤵
  - Program crash
  PID:4740
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 1164
  2⤵
  - Program crash
  PID:756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\tSL3ksPjJbk6VljpGKJYoNf\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4872
- - C:\Users\Admin\AppData\Local\Temp\tSL3ksPjJbk6VljpGKJYoNf\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\tSL3ksPjJbk6VljpGKJYoNf\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4500
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 1388
  2⤵
  - Program crash
  PID:4588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 1664
  2⤵
  - Program crash
  PID:2228
- 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:4280
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 792 -s 500
  2⤵
  - Program crash
  PID:2976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 792 -ip 792
1⤵
PID:4000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 792 -ip 792
1⤵
PID:428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 792 -ip 792
1⤵
PID:3704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 792 -ip 792
1⤵
PID:112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 792 -ip 792
1⤵
PID:2444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 792 -ip 792
1⤵
PID:4440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 792 -ip 792
1⤵
PID:4792

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 792 -ip 792
1⤵
PID:772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 792 -ip 792
1⤵
PID:964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 792 -ip 792
1⤵
PID:3444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 792 -ip 792
1⤵
PID:4564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 792 -ip 792
1⤵
PID:3084

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\tSL3ksPjJbk6VljpGKJYoNf\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\tSL3ksPjJbk6VljpGKJYoNf\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\tSL3ksPjJbk6VljpGKJYoNf\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/792-153-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/792-132-0x000000000060C000-0x0000000000632000-memory.dmp

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memory/792-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/792-134-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/792-152-0x000000000060C000-0x0000000000632000-memory.dmp

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memory/792-133-0x00000000005B0000-0x00000000005EF000-memory.dmp

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memory/792-143-0x000000000060C000-0x0000000000632000-memory.dmp

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memory/792-144-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/4500-145-0x00007FFC99A70000-0x00007FFC9A531000-memory.dmp

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memory/4500-142-0x00000295BB890000-0x00000295BB8D2000-memory.dmp

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memory/4500-140-0x00007FFC99A70000-0x00007FFC9A531000-memory.dmp

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memory/4500-139-0x000002959FF40000-0x00000295A0096000-memory.dmp

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