nymaim | 8b89fe8301da063958fe0df539e47781319a4f0c9a4b8bd0f49bf5c845308319

Analysis

max time kernel
114s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
08/10/2022, 16:07

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General

Target
file.exe
Size 398KB
Sample221008-tkmsxafbaj
SHA256 8b89fe8301da063958fe0df539e47781319a4f0c9a4b8bd0f49bf5c845308319
MD5 5cffb6f6ef9e077a11191ef7751a85a0
SHA1 dde5c6c23cc607637e9b01d4f78862c64b83fc12
SHA512 983fe3b8d6cacd52d8be3ffd61d3360a3b38c88046f5b80772d181f2dbb5d7a321e5aa6c4420d0709659105285102047592b6a879154034a6449e5c38681feeb
SSDEEP 6144:d27B+AVkMmGcMppJgmaM/YOYDQzhvMhrpW+G1JKxS/RxJJ4srwVfeXOW:dskMmGcMppJgmaMAOKQzB+GJRxJJ4sL
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

Executes dropped EXE 1 IoCs

pid	Process
4616	UuKmgHlEsdY.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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 9 IoCs

pid	pid_target	Process	procid_target
4916	1872	WerFault.exe	82
4784	1872	WerFault.exe	82
3532	1872	WerFault.exe	82
4736	1872	WerFault.exe	82
3928	1872	WerFault.exe	82
1336	1872	WerFault.exe	82
4912	1872	WerFault.exe	82
3912	1872	WerFault.exe	82
2812	1872	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
3160	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1872	file.exe
1872	file.exe
1872	file.exe
1872	file.exe
1872	file.exe
1872	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3160	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1872 wrote to memory of 4616	1872	file.exe	99
PID 1872 wrote to memory of 4616	1872	file.exe	99
PID 1872 wrote to memory of 4616	1872	file.exe	99
PID 1872 wrote to memory of 2608	1872	file.exe	109
PID 1872 wrote to memory of 2608	1872	file.exe	109
PID 1872 wrote to memory of 2608	1872	file.exe	109
PID 2608 wrote to memory of 3160	2608	cmd.exe	113
PID 2608 wrote to memory of 3160	2608	cmd.exe	113
PID 2608 wrote to memory of 3160	2608	cmd.exe	113

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 use of WriteProcessMemory
PID:1872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 456
  2⤵
  - Program crash
  PID:4916
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 764
  2⤵
  - Program crash
  PID:4784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 784
  2⤵
  - Program crash
  PID:3532
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 784
  2⤵
  - Program crash
  PID:4736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 836
  2⤵
  - Program crash
  PID:3928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 928
  2⤵
  - Program crash
  PID:1336
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 932
  2⤵
  - Program crash
  PID:4912
- C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\UuKmgHlEsdY.exe
  2⤵
  - Executes dropped EXE
  PID:4616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 1436
  2⤵
  - Program crash
  PID:3912
- 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:2608
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3160
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1872 -s 532
  2⤵
  - Program crash
  PID:2812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1872 -ip 1872
1⤵
PID:444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 1872 -ip 1872
1⤵
PID:4812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1872 -ip 1872
1⤵
PID:4236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 1872 -ip 1872
1⤵
PID:4696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1872 -ip 1872
1⤵
PID:1224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1872 -ip 1872
1⤵
PID:1440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 1872 -ip 1872
1⤵
PID:3588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 1872 -ip 1872
1⤵
PID:2344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 1872 -ip 1872
1⤵
PID:1092

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

UuKmgHlEsdY.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\UuKmgHlEsdY.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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UuKmgHlEsdY.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\UuKmgHlEsdY.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1872-146-0x000000000061D000-0x000000000064E000-memory.dmp

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memory/1872-133-0x00000000020A0000-0x00000000020F3000-memory.dmp

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memory/1872-134-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1872-147-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1872-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1872-142-0x000000000061D000-0x000000000064E000-memory.dmp

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memory/1872-143-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1872-132-0x000000000061D000-0x000000000064E000-memory.dmp

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