nymaim | f32fd1df0fc0b0c9902b0cd6e19e260e9cfd2a3c67a0813dc9a14e66aeec6227

General

Target

file.exe
Size

1.2MB
MD5

e0ff6724c892c0b089b9cff0310f9720
SHA1

03c6a55678e3d7a28948ff4b9d7c4642471f5a4f
SHA256

f32fd1df0fc0b0c9902b0cd6e19e260e9cfd2a3c67a0813dc9a14e66aeec6227
SHA512

5641aebb160a59622f7ced3df66b4bc1c40a6b2557f8b47d858211dd0703732b11856c91d1f5b87bf834fced3e8c31397d06ae0e35052c347f7e8a6a20667bb7
SSDEEP

24576:JizhDbtS6E0cJe8SHJVP2yrkbdIldvLjM9YsmV02fzJYNNpXSHgZIY7eCLxYiL:CG6E0cJezpVP2mhLvLjUJNvNNeViL

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

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
2384	is-803IK.tmp
4904	PrintFolders.exe
5088	KpuwCBIE4QIqqD.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2384	is-803IK.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-SH22R.tmp	is-803IK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T4COK.tmp	is-803IK.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-803IK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5PUBL.tmp	is-803IK.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-803IK.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-803IK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DFHBS.tmp	is-803IK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NTMRU.tmp	is-803IK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5I848.tmp	is-803IK.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
4708	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4904	PrintFolders.exe
4904	PrintFolders.exe
4904	PrintFolders.exe
4904	PrintFolders.exe
4904	PrintFolders.exe
4904	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4904	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4708	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4200 wrote to memory of 2384	4200	file.exe	82
PID 4200 wrote to memory of 2384	4200	file.exe	82
PID 4200 wrote to memory of 2384	4200	file.exe	82
PID 2384 wrote to memory of 4904	2384	is-803IK.tmp	83
PID 2384 wrote to memory of 4904	2384	is-803IK.tmp	83
PID 2384 wrote to memory of 4904	2384	is-803IK.tmp	83
PID 4904 wrote to memory of 5088	4904	PrintFolders.exe	84
PID 4904 wrote to memory of 5088	4904	PrintFolders.exe	84
PID 4904 wrote to memory of 5088	4904	PrintFolders.exe	84
PID 4904 wrote to memory of 4760	4904	PrintFolders.exe	99
PID 4904 wrote to memory of 4760	4904	PrintFolders.exe	99
PID 4904 wrote to memory of 4760	4904	PrintFolders.exe	99
PID 4760 wrote to memory of 4708	4760	cmd.exe	101
PID 4760 wrote to memory of 4708	4760	cmd.exe	101
PID 4760 wrote to memory of 4708	4760	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Users\Admin\AppData\Local\Temp\is-L8QD3.tmp\is-803IK.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-L8QD3.tmp\is-803IK.tmp" /SL4 $90056 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1062872 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2384
- - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4904
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\KpuwCBIE4QIqqD.exe
      4⤵
      Executes dropped EXE
      PID:5088
  - - 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:4760
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4708

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.4MB

MD5
3acd7b731b266ad6307d62d4a4658f87

SHA1
60e8f32715d391e980b09a6b12fba64215c77ba7

SHA256
acab2c1b6835eeda973fefdc5a425b876e1b59ea0510082b7858793f0457ca50

SHA512
3e8fcc26a889d1d9e6df18c4f19b6c1014febcf100890077dd852a7ae558c23f7994f099520c7d049e91dd9e8c1f8e551c92b8c5dc13c9ff5731c0c18e4db599

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.4MB

MD5
3acd7b731b266ad6307d62d4a4658f87

SHA1
60e8f32715d391e980b09a6b12fba64215c77ba7

SHA256
acab2c1b6835eeda973fefdc5a425b876e1b59ea0510082b7858793f0457ca50

SHA512
3e8fcc26a889d1d9e6df18c4f19b6c1014febcf100890077dd852a7ae558c23f7994f099520c7d049e91dd9e8c1f8e551c92b8c5dc13c9ff5731c0c18e4db599

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3LF14.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-L8QD3.tmp\is-803IK.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-L8QD3.tmp\is-803IK.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\KpuwCBIE4QIqqD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\KpuwCBIE4QIqqD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4200-148-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4200-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4200-157-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4200-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4904-149-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4904-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4904-142-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4904-155-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4904-144-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4904-143-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download

Analysis

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