nymaim | 4dd28dd784a8fd0abddf3320737dbb40c1c29af3ae71279a5cc47f201679604d

Analysis

max time kernel
99s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2022, 09:39

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General

Target
file.exe
Size 230KB
Sample220930-lml1dseahj
SHA256 4dd28dd784a8fd0abddf3320737dbb40c1c29af3ae71279a5cc47f201679604d
MD5 81c6041e65c69fc01969d39a902911c7
SHA1 73508e8e34dbc95f1010e82c074658c2ccc21966
SHA512 ed5d1a2d064c657135e393276213b2d47f02b999cab3c82d177695819734e1531e10f598282ad25125c4b3b5e0016d1d90b8a2c1b07aa1241a79f38148cd9dc2
SSDEEP 3072:TlKUqM4hlqRkKvgZTYjjJJg5qi3rqop/cOBJgsN/8553a1vy49WkZmuHbA0bL2:14yIKdJg5q8UoN/U34y0Zv7A0bC
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
2184	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
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
2324	4664	WerFault.exe	80
2840	4664	WerFault.exe	80
4868	4664	WerFault.exe	80
4872	4664	WerFault.exe	80
696	4664	WerFault.exe	80
4244	4664	WerFault.exe	80
1784	4664	WerFault.exe	80
2864	4664	WerFault.exe	80
4944	4664	WerFault.exe	80
2388	4664	WerFault.exe	80
3456	4664	WerFault.exe	80
4920	4664	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
4728	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4664	file.exe
4664	file.exe
4664	file.exe
4664	file.exe
4664	file.exe
4664	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4664	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	Cleaner.exe
Token: SeDebugPrivilege	4728	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 2196	4664	file.exe	100
PID 4664 wrote to memory of 2196	4664	file.exe	100
PID 4664 wrote to memory of 2196	4664	file.exe	100
PID 2196 wrote to memory of 2184	2196	cmd.exe	102
PID 2196 wrote to memory of 2184	2196	cmd.exe	102
PID 4664 wrote to memory of 5036	4664	file.exe	117
PID 4664 wrote to memory of 5036	4664	file.exe	117
PID 4664 wrote to memory of 5036	4664	file.exe	117
PID 5036 wrote to memory of 4728	5036	cmd.exe	121
PID 5036 wrote to memory of 4728	5036	cmd.exe	121
PID 5036 wrote to memory of 4728	5036	cmd.exe	121

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:4664
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 452
  2⤵
  - Program crash
  PID:2324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 476
  2⤵
  - Program crash
  PID:2840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 784
  2⤵
  - Program crash
  PID:4868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 804
  2⤵
  - Program crash
  PID:4872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 812
  2⤵
  - Program crash
  PID:696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 840
  2⤵
  - Program crash
  PID:4244
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 1008
  2⤵
  - Program crash
  PID:1784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 1088
  2⤵
  - Program crash
  PID:2864
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 1196
  2⤵
  - Program crash
  PID:4944
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\89YTk0WCSwYheZyFe\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Users\Admin\AppData\Local\Temp\89YTk0WCSwYheZyFe\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\89YTk0WCSwYheZyFe\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2184
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 1400
  2⤵
  - Program crash
  PID:2388
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 1672
  2⤵
  - Program crash
  PID:3456
- 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:5036
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4728
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 452
  2⤵
  - Program crash
  PID:4920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4664 -ip 4664
1⤵
PID:4544

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 4664 -ip 4664
1⤵
PID:3456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4664 -ip 4664
1⤵
PID:5004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4664 -ip 4664
1⤵
PID:4844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4664 -ip 4664
1⤵
PID:3404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 4664 -ip 4664
1⤵
PID:5048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 4664 -ip 4664
1⤵
PID:3964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 4664 -ip 4664
1⤵
PID:4456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 620 -p 4664 -ip 4664
1⤵
PID:4432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 628 -p 4664 -ip 4664
1⤵
PID:1592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 656 -p 4664 -ip 4664
1⤵
PID:2324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4664 -ip 4664
1⤵
PID:4320

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\89YTk0WCSwYheZyFe\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\89YTk0WCSwYheZyFe\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\89YTk0WCSwYheZyFe\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/2184-142-0x00007FFE1C0B0000-0x00007FFE1CB71000-memory.dmp

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memory/2184-144-0x00007FFE1C0B0000-0x00007FFE1CB71000-memory.dmp

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memory/2184-141-0x000001DEBFF40000-0x000001DEBFF82000-memory.dmp

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memory/2184-139-0x000001DEBFA20000-0x000001DEBFB78000-memory.dmp

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memory/4664-133-0x00000000022E0000-0x000000000231F000-memory.dmp

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memory/4664-134-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/4664-132-0x00000000006D9000-0x00000000006FF000-memory.dmp

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memory/4664-143-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/4664-145-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4664-151-0x0000000000400000-0x0000000000597000-memory.dmp

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