nymaim | f778ab48c15c763851f9ded15e8e1d820cfeab44201e0cecee97a30dcbea95bb

Analysis

max time kernel
100s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26/09/2022, 03:27

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General

Target
file.exe
Size 258KB
Sample220926-dzrgmsadek
SHA256 f778ab48c15c763851f9ded15e8e1d820cfeab44201e0cecee97a30dcbea95bb
MD5 e72aa3bdaeba4b143cd3a4a05665adb7
SHA1 13bf4b4bfc9e69f86869b96b69867ade9dca2284
SHA512 3035c3bf29b4841f444f68d1e8d727d5f96e8a564233e25ee6f861e969ee991f4889a9b7ce6134a198480aa1305ff3355fdecb12f95d9ef3e55f210b0293c46a
SSDEEP 3072:IPLSoWcF4+x35agV7BMLjvrNX0GpZO2fPNUsurmY4tbsRZKER59tcXZUQcgHO+CT:+CfS7BebrPDmsA4tbUR3uWQcgdsc3+
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
3456	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
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
2156	3172	WerFault.exe	78
4276	3172	WerFault.exe	78
5116	3172	WerFault.exe	78
2016	3172	WerFault.exe	78
392	3172	WerFault.exe	78
1856	3172	WerFault.exe	78
4864	3172	WerFault.exe	78
700	3172	WerFault.exe	78
1620	3172	WerFault.exe	78
748	3172	WerFault.exe	78
2592	3172	WerFault.exe	78

Kills process with taskkill 1 IoCs

evasion

pid	Process
400	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3172	file.exe
3172	file.exe
3172	file.exe
3172	file.exe
3172	file.exe
3172	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3172	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3456	Cleaner.exe
Token: SeDebugPrivilege	400	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 4152	3172	file.exe	102
PID 3172 wrote to memory of 4152	3172	file.exe	102
PID 3172 wrote to memory of 4152	3172	file.exe	102
PID 4152 wrote to memory of 3456	4152	cmd.exe	104
PID 4152 wrote to memory of 3456	4152	cmd.exe	104
PID 3172 wrote to memory of 4092	3172	file.exe	113
PID 3172 wrote to memory of 4092	3172	file.exe	113
PID 3172 wrote to memory of 4092	3172	file.exe	113
PID 4092 wrote to memory of 400	4092	cmd.exe	117
PID 4092 wrote to memory of 400	4092	cmd.exe	117
PID 4092 wrote to memory of 400	4092	cmd.exe	117

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:3172
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 452
  2⤵
  - Program crash
  PID:2156
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 772
  2⤵
  - Program crash
  PID:4276
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 780
  2⤵
  - Program crash
  PID:5116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 780
  2⤵
  - Program crash
  PID:2016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 856
  2⤵
  - Program crash
  PID:392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 928
  2⤵
  - Program crash
  PID:1856
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 932
  2⤵
  - Program crash
  PID:4864
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 1372
  2⤵
  - Program crash
  PID:700
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\eMpo7iR9n7uIdKiD4ng2\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4152
- - C:\Users\Admin\AppData\Local\Temp\eMpo7iR9n7uIdKiD4ng2\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\eMpo7iR9n7uIdKiD4ng2\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 1388
  2⤵
  - Program crash
  PID:1620
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 1308
  2⤵
  - Program crash
  PID:748
- 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:4092
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:400
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3172 -s 536
  2⤵
  - Program crash
  PID:2592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3172 -ip 3172
1⤵
PID:4868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3172 -ip 3172
1⤵
PID:1340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3172 -ip 3172
1⤵
PID:5048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3172 -ip 3172
1⤵
PID:964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3172 -ip 3172
1⤵
PID:3380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3172 -ip 3172
1⤵
PID:2260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3172 -ip 3172
1⤵
PID:2004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3172 -ip 3172
1⤵
PID:3028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3172 -ip 3172
1⤵
PID:2248

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3172 -ip 3172
1⤵
PID:1744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3172 -ip 3172
1⤵
PID:2184

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\eMpo7iR9n7uIdKiD4ng2\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\eMpo7iR9n7uIdKiD4ng2\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\eMpo7iR9n7uIdKiD4ng2\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/3172-143-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/3172-132-0x0000000000739000-0x000000000075F000-memory.dmp

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memory/3172-134-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/3172-133-0x0000000002300000-0x000000000233F000-memory.dmp

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memory/3172-145-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3172-151-0x0000000000400000-0x000000000059B000-memory.dmp

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memory/3456-141-0x000002719DB00000-0x000002719DB42000-memory.dmp

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memory/3456-142-0x00007FFA79C40000-0x00007FFA7A701000-memory.dmp

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memory/3456-139-0x000002719BCB0000-0x000002719BE30000-memory.dmp

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memory/3456-144-0x00007FFA79C40000-0x00007FFA7A701000-memory.dmp

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