nymaim | a120a87049bbc78fe6651ee4b9602c5cc05666e1a7db4ac8e53c0ecbc2fd06e7

Analysis

max time kernel
102s
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
05/10/2022, 15:12

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General

Target
file.exe
Size 367KB
Sample221005-sk614seff7
SHA256 a120a87049bbc78fe6651ee4b9602c5cc05666e1a7db4ac8e53c0ecbc2fd06e7
MD5 a65f292880c2e8eb18d8b3f8686c9ed6
SHA1 22cda93e3435130c76e5afb591815b1e67d9eb50
SHA512 518153a542e15e589d51172ea53ab1e8bb502f14526175e60461a4f17bc1ae58507c5f1433e9d2bfb5164c6caabbabd0d17602eb5870f76faeb4c1b9c145d3a4
SSDEEP 6144:sRFGKkqeLCPp0Cz2nx14kr26ZAE+q67xrc49sFpYUuzbgwuhvbAwwVfU:sRoqe2Pp0CCnxHr2xE+q74Opunnm8Y
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
4852	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/0x000300000001e6b9-137.dat	autoit_exe
behavioral2/files/0x000300000001e6b9-138.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 11 IoCs

pid	pid_target	Process	procid_target
4896	1284	WerFault.exe	81
4456	1284	WerFault.exe	81
3196	1284	WerFault.exe	81
2196	1284	WerFault.exe	81
384	1284	WerFault.exe	81
1956	1284	WerFault.exe	81
1064	1284	WerFault.exe	81
4176	1284	WerFault.exe	81
3392	1284	WerFault.exe	81
4728	1284	WerFault.exe	81
1136	1284	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
4060	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1284	file.exe
1284	file.exe
1284	file.exe
1284	file.exe
1284	file.exe
1284	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1284	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4852	Cleaner.exe
Token: SeDebugPrivilege	4060	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1284 wrote to memory of 4512	1284	file.exe	106
PID 1284 wrote to memory of 4512	1284	file.exe	106
PID 1284 wrote to memory of 4512	1284	file.exe	106
PID 4512 wrote to memory of 4852	4512	cmd.exe	108
PID 4512 wrote to memory of 4852	4512	cmd.exe	108
PID 1284 wrote to memory of 724	1284	file.exe	117
PID 1284 wrote to memory of 724	1284	file.exe	117
PID 1284 wrote to memory of 724	1284	file.exe	117
PID 724 wrote to memory of 4060	724	cmd.exe	120
PID 724 wrote to memory of 4060	724	cmd.exe	120
PID 724 wrote to memory of 4060	724	cmd.exe	120

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:1284
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 452
  2⤵
  - Program crash
  PID:4896
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 772
  2⤵
  - Program crash
  PID:4456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 804
  2⤵
  - Program crash
  PID:3196
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 772
  2⤵
  - Program crash
  PID:2196
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 788
  2⤵
  - Program crash
  PID:384
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 928
  2⤵
  - Program crash
  PID:1956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 960
  2⤵
  - Program crash
  PID:1064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 1372
  2⤵
  - Program crash
  PID:4176
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\FQH36uG1AuMVtfayg8cg\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Users\Admin\AppData\Local\Temp\FQH36uG1AuMVtfayg8cg\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\FQH36uG1AuMVtfayg8cg\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4852
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 1388
  2⤵
  - Program crash
  PID:3392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 1408
  2⤵
  - Program crash
  PID:4728
- 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:724
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 492
  2⤵
  - Program crash
  PID:1136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1284 -ip 1284
1⤵
PID:2884

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1284 -ip 1284
1⤵
PID:4256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 1284 -ip 1284
1⤵
PID:2568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 1284 -ip 1284
1⤵
PID:808

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 1284 -ip 1284
1⤵
PID:4736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 1284 -ip 1284
1⤵
PID:3044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 592 -p 1284 -ip 1284
1⤵
PID:4508

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 616 -p 1284 -ip 1284
1⤵
PID:4980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 1284 -ip 1284
1⤵
PID:3972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 656 -p 1284 -ip 1284
1⤵
PID:1380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 644 -p 1284 -ip 1284
1⤵
PID:5032

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\FQH36uG1AuMVtfayg8cg\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\FQH36uG1AuMVtfayg8cg\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\FQH36uG1AuMVtfayg8cg\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/1284-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1284-144-0x0000000002080000-0x00000000020BF000-memory.dmp

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memory/1284-154-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/1284-153-0x00000000005FC000-0x0000000000622000-memory.dmp

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memory/1284-134-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/1284-133-0x0000000002080000-0x00000000020BF000-memory.dmp

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memory/1284-132-0x00000000005FC000-0x0000000000622000-memory.dmp

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memory/1284-145-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/1284-143-0x00000000005FC000-0x0000000000622000-memory.dmp

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memory/4852-146-0x00007FFE1B740000-0x00007FFE1C201000-memory.dmp

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memory/4852-142-0x000001FDF9C50000-0x000001FDF9C92000-memory.dmp

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memory/4852-141-0x00007FFE1B740000-0x00007FFE1C201000-memory.dmp

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memory/4852-139-0x000001FDDF600000-0x000001FDDF756000-memory.dmp

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