nymaim | f4f6bcce8531ffa055776e57b0f650b7f87049808e3b29d65fab79ec841ed81c

Analysis

max time kernel
136s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03/10/2022, 15:00

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General

Target
file.exe
Size 232KB
Sample221003-sdaz4acbbq
SHA256 f4f6bcce8531ffa055776e57b0f650b7f87049808e3b29d65fab79ec841ed81c
MD5 a3b774ed5023f56970eea0668ae65703
SHA1 3aebfec7980d1db1edbeccbb29044ea677be304b
SHA512 98a9ec33206f8074104b2ecb19026cdbbe1a313e8f2be6ab088611c9c2dda1b7aaaf10a610376acbc9c5448076becc4685ef364d78dfbbb2eabfb3ddcf0117f6
SSDEEP 6144:iV8tR1u52up3sfkVXJYS1Ne/1z0BvEQTEOMEd:iV8trKM87YS1Ne9zY8MEtEd
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
1948	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-1-5-21-2891029575-1462575-1165213807-1000\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/0x0015000000022f5f-140.dat	autoit_exe
behavioral2/files/0x0015000000022f5f-141.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 10 IoCs

pid	pid_target	Process	procid_target
1756	4132	WerFault.exe	82
800	4132	WerFault.exe	82
228	4132	WerFault.exe	82
1572	4132	WerFault.exe	82
3760	4132	WerFault.exe	82
3092	4132	WerFault.exe	82
3412	4132	WerFault.exe	82
1080	4132	WerFault.exe	82
3408	4132	WerFault.exe	82
60	4132	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
208	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4132	file.exe
4132	file.exe
4132	file.exe
4132	file.exe
4132	file.exe
4132	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4132	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1948	Cleaner.exe
Token: SeDebugPrivilege	208	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4132 wrote to memory of 2344	4132	file.exe	101
PID 4132 wrote to memory of 2344	4132	file.exe	101
PID 4132 wrote to memory of 2344	4132	file.exe	101
PID 2344 wrote to memory of 1948	2344	cmd.exe	103
PID 2344 wrote to memory of 1948	2344	cmd.exe	103
PID 4132 wrote to memory of 2340	4132	file.exe	117
PID 4132 wrote to memory of 2340	4132	file.exe	117
PID 4132 wrote to memory of 2340	4132	file.exe	117
PID 2340 wrote to memory of 208	2340	cmd.exe	119
PID 2340 wrote to memory of 208	2340	cmd.exe	119
PID 2340 wrote to memory of 208	2340	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:4132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 456
  2⤵
  - Program crash
  PID:1756
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 768
  2⤵
  - Program crash
  PID:800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 808
  2⤵
  - Program crash
  PID:228
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 808
  2⤵
  - Program crash
  PID:1572
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 768
  2⤵
  - Program crash
  PID:3760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 868
  2⤵
  - Program crash
  PID:3092
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 840
  2⤵
  - Program crash
  PID:3412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 1380
  2⤵
  - Program crash
  PID:1080
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\RQu518yS6Y4CVcN\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2344
- - C:\Users\Admin\AppData\Local\Temp\RQu518yS6Y4CVcN\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\RQu518yS6Y4CVcN\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 1396
  2⤵
  - Program crash
  PID:3408
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 1656
  2⤵
  - Program crash
  PID:60
- 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:2340
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4132 -ip 4132
1⤵
PID:4952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 396 -p 4132 -ip 4132
1⤵
PID:2340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4132 -ip 4132
1⤵
PID:4052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4132 -ip 4132
1⤵
PID:4200

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 396 -p 4132 -ip 4132
1⤵
PID:4812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4132 -ip 4132
1⤵
PID:4532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4132 -ip 4132
1⤵
PID:2956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4132 -ip 4132
1⤵
PID:4388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 4132 -ip 4132
1⤵
PID:4152

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4132 -ip 4132
1⤵
PID:1784

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\RQu518yS6Y4CVcN\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\RQu518yS6Y4CVcN\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\RQu518yS6Y4CVcN\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/1948-143-0x00007FFAE3950000-0x00007FFAE4411000-memory.dmp

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memory/1948-146-0x00007FFAE3950000-0x00007FFAE4411000-memory.dmp

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memory/1948-145-0x0000023031420000-0x0000023031462000-memory.dmp

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memory/1948-142-0x0000023030F00000-0x0000023031056000-memory.dmp

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memory/4132-137-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/4132-132-0x000000000075D000-0x0000000000783000-memory.dmp

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memory/4132-136-0x0000000002320000-0x000000000235F000-memory.dmp

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memory/4132-135-0x000000000075D000-0x0000000000783000-memory.dmp

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memory/4132-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4132-134-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/4132-152-0x000000000075D000-0x0000000000783000-memory.dmp

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memory/4132-153-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/4132-133-0x0000000002320000-0x000000000235F000-memory.dmp

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