nymaim | 7300a8a4e342ade9e360fffac0bab7ba5060a97131f6ba00195eef895612786b

Analysis

max time kernel
178s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06/12/2022, 01:01

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General

Target
file.exe
Size 3.7MB
Sample221206-bc75rsga2s
SHA256 7300a8a4e342ade9e360fffac0bab7ba5060a97131f6ba00195eef895612786b
MD5 b68f34e1d2dda69601757868d889b8b6
SHA1 5ce6bf9c54549f6408df9ce82e6e208a09f6b4e3
SHA512 77d716dc09a18c354bc844cee88dd5a1ae4e931fc8438774f06b0298d65b4501949b1d763c95e9e815a12bd2e78b3dcae29d17f15100415ff9a6bb847f79b90e
SSDEEP 49152:gmWU23+puqa5OzjmHCcfw3TWiJUT/Hem+L00z+UvOFnCoJlW2b60iMr3EeOCgSYe:guFGDHx0TVc/HemD4+B7lWC60ZEcY/2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
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 3 IoCs

pid	Process
4448	is-UK1H2.tmp
4972	PrintFolders.exe
4856	ArKUNveFULG.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4448	is-UK1H2.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-MU803.tmp	is-UK1H2.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0PV9J.tmp	is-UK1H2.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-UK1H2.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-UK1H2.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-UK1H2.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TGOC3.tmp	is-UK1H2.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IHV2N.tmp	is-UK1H2.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6CRN1.tmp	is-UK1H2.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7V1L2.tmp	is-UK1H2.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
960	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4972	PrintFolders.exe
4972	PrintFolders.exe
4972	PrintFolders.exe
4972	PrintFolders.exe
4972	PrintFolders.exe
4972	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	960	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 4448	4300	file.exe	80
PID 4300 wrote to memory of 4448	4300	file.exe	80
PID 4300 wrote to memory of 4448	4300	file.exe	80
PID 4448 wrote to memory of 4972	4448	is-UK1H2.tmp	81
PID 4448 wrote to memory of 4972	4448	is-UK1H2.tmp	81
PID 4448 wrote to memory of 4972	4448	is-UK1H2.tmp	81
PID 4972 wrote to memory of 4856	4972	PrintFolders.exe	82
PID 4972 wrote to memory of 4856	4972	PrintFolders.exe	82
PID 4972 wrote to memory of 4856	4972	PrintFolders.exe	82
PID 4972 wrote to memory of 528	4972	PrintFolders.exe	83
PID 4972 wrote to memory of 528	4972	PrintFolders.exe	83
PID 4972 wrote to memory of 528	4972	PrintFolders.exe	83
PID 528 wrote to memory of 960	528	cmd.exe	85
PID 528 wrote to memory of 960	528	cmd.exe	85
PID 528 wrote to memory of 960	528	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4300
- C:\Users\Admin\AppData\Local\Temp\is-I9VAQ.tmp\is-UK1H2.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-I9VAQ.tmp\is-UK1H2.tmp" /SL4 $30060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3618716 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4972
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\ArKUNveFULG.exe
      4⤵
      Executes dropped EXE
      PID:4856
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:528
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:960

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

Replay Monitor

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.0MB
SHA256 f28022888edb95f2a19c70f1926f5d128737886bab52bd513a5bd102cb59cf17
MD5 2ddfe0c878eb7ae2c5d4edb5eec15223
SHA1 c387da40633e9c4d675352774f8aed4f044473b0
SHA512 34f48ae8f588c7044855311433e227651dbf6ed69a70ae8f1aac328cf6e3f4609e42c8f7f6e5511d56a300c878fbe9a0c42012f65817f07df028519393da616a
SSDEEP 98304:B3DTjd75PniyBESzgutKRm9gQG+x8zAjqegRV:T75FEd
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.0MB
SHA256 f28022888edb95f2a19c70f1926f5d128737886bab52bd513a5bd102cb59cf17
MD5 2ddfe0c878eb7ae2c5d4edb5eec15223
SHA1 c387da40633e9c4d675352774f8aed4f044473b0
SHA512 34f48ae8f588c7044855311433e227651dbf6ed69a70ae8f1aac328cf6e3f4609e42c8f7f6e5511d56a300c878fbe9a0c42012f65817f07df028519393da616a
SSDEEP 98304:B3DTjd75PniyBESzgutKRm9gQG+x8zAjqegRV:T75FEd
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-HO4QR.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-UK1H2.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-I9VAQ.tmp\is-UK1H2.tmp
Size 797KB
SHA256 4252858d9c6d8d55f829d7e418ea8357fd26fbdf8c0fce1fed23a8c720a8807e
MD5 10c841b0221d6870de7c951eaf5b1da9
SHA1 7cd2baa89144371033d8d7bebf947da886cd8795
SHA512 e2330231d6056cf8f395e1b884e136ee29161f9b9afb4492e9057aaa254c8a9b89b95be8bd11dc6d83fdc2147b864529ce49ef072015f9f40f677a0f8d12555e
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvacxKcxOu:njrP837JzHvA6pnvFxv1fp
MD5 SHA1 SHA512 SSDEEP

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is-UK1H2.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-I9VAQ.tmp\is-UK1H2.tmp
Size 797KB
SHA256 4252858d9c6d8d55f829d7e418ea8357fd26fbdf8c0fce1fed23a8c720a8807e
MD5 10c841b0221d6870de7c951eaf5b1da9
SHA1 7cd2baa89144371033d8d7bebf947da886cd8795
SHA512 e2330231d6056cf8f395e1b884e136ee29161f9b9afb4492e9057aaa254c8a9b89b95be8bd11dc6d83fdc2147b864529ce49ef072015f9f40f677a0f8d12555e
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvacxKcxOu:njrP837JzHvA6pnvFxv1fp
MD5 SHA1 SHA512 SSDEEP

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ArKUNveFULG.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\ArKUNveFULG.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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ArKUNveFULG.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\ArKUNveFULG.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/4300-156-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4300-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4300-137-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4972-143-0x0000000000400000-0x0000000001804000-memory.dmp

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memory/4972-148-0x0000000000400000-0x0000000001804000-memory.dmp

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memory/4972-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4972-144-0x0000000000400000-0x0000000001804000-memory.dmp

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memory/4972-142-0x0000000000400000-0x0000000001804000-memory.dmp

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memory/4972-155-0x0000000000400000-0x0000000001804000-memory.dmp

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